{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "All patients were examined preoperatively and 39 were examined at six months ; 27 of the patients were also examined at one year , and 11 at two years ."}
{"Disease": [], "Chemical": []}